if (Ext.isEmpty(vMsn)) {
    return;
}

var me = this;
YX.ZbusRpc.request({
    module: 'SmatViewMaterialSnService',
    params: {
        msn: vMsn
    },
    success: function(rsp) {
        if (!Ext.isEmpty(rsp.msnList)) {
            me.loadMsnCompleted(p, rsp.msnList[0]);
        }
    }
});